Fix parsing issue inside if conditions

eval/eval_test.go

@@ -965,3 +965,18 @@ func TestCrashKeys(t *testing.T) {
 		t.Errorf("should not have errored: %v", err)
 	}
 }
+
+func TestParenInIf(t *testing.T) {
+	inp := `if (1+2)==3 {42}`
+	s := eval.NewState()
+	res, err := eval.EvalString(s, inp, false)
+	if err != nil {
+		t.Fatalf("should not have errored: %v", err)
+	}
+	if res.Type() != object.INTEGER {
+		t.Fatalf("should have returned an integer, got %#v", res)
+	}
+	if res.Inspect() != "42" {
+		t.Errorf("wrong result, got %q", res.Inspect())
+	}
+}

main_test.txtar

@@ -251,6 +251,10 @@ cmp stdout json_output
 grol -quiet -c '()=>{{"a":1,"b":2}}'
 stdout '^\(\)=>{{"a":1,"b":2}}$'
 
+# if extra paren are needed (like for a[x] in the left part of if condition) it should still parse.
+grol -quiet -c '()=> if 1+2==3 {4}'
+stdout '^\(\)=>if \(1\+2\)==3\{4}$'
+
 -- json_output --
 {
   "63": 63,

parser/parser.go

@@ -542,19 +542,9 @@ func (p *Parser) parseIfExpression() ast.Node {
 	expression := &ast.IfExpression{}
 	expression.Token = p.curToken
 
-	needCloseParen := false
-	if p.peekTokenIs(token.LPAREN) {
-		needCloseParen = true
-		p.nextToken()
-	}
-
 	p.nextToken()
 	expression.Condition = p.parseExpression(LOWEST)
 
-	if needCloseParen && !p.expectPeek(token.RPAREN) {
-		return nil
-	}
-
 	if !p.expectPeek(token.LBRACE) {
 		return nil
 	}